A: A blood moon is a deep reddening of the moon caused by the Earth passing between the moon and the sun. During the period of the eclipse, light from the sun... Full Answer >
Sometimes, bones are the only accessible source of DNA, thanks to their structure, which preserves DNA comparatively well and for a long time. The main problems of DNA extraction from bones are DNA degradation due to environmental factors and the presence of soil-derived inhibitors like humus acids [1â10].
Researchers have uncovered a new clue about human origins after discovering the oldest known human DNA in a legendary Spanish archeological site called Sima de los Huesos, or the Pit of Bones.. Researchers were able to extract DNA from a leg bone that was estimated to be 400,000 years old. After extracting the DNA from a femur bone, Matthias Meyer, who published his findings in a study in the journal Nature, was able to replicate the entire genome for the ancient human relative.